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Electrical Impedance Tomography Developed to Identify Brain Hemorrhaging in Preterm Babies

By MedImaging International staff writers
Posted on 11 Oct 2012
A new US grant is helping researchers to develop a device that not only monitors preterm infants’ delicate brains, but also identifies intraventricular bleeding as soon as it begins. The research should also give physicians a more detailed determination and timeline of how and when brain hemorrhages typically occur in babies.

Nearly one-third of premature infants develop bleeding in the brain after birth, a problem linked with serious long-term effects such as cerebral palsy, blindness, and seizures. But some of these severe complications could be prevented if physicians could identify and treat such brain hemorrhaging, also called intraventricular bleeding, when it begins.

To accomplish this, University of Florida (Gainesville, USA) researchers from the colleges of medicine and engineering have received a two-year, USD 694,000 grant from the US National Institute of Neurological Disorders and Stroke (Bethesda, MD, USA) in collaboration with EGI, Inc. (Eugene, OR, USA) to develop the technology.

“When we look at preterm babies with intraventricular hemorrhages, we detect them after the fact, so we really don’t know what is happening in the brain at the time of the hemorrhage,” said Dr. Michael Weiss, a neonatologist and an associate professor of pediatrics in the College of Medicine who has teamed with biomedical engineer Dr. Rosalind Sadleir, from the College of Engineering, on the project. “If we can identify the exact moment when a bleed occurs, we may be able to develop therapies that can help prevent bad outcomes from happening.”

The researchers will utilize a technique known as electrical impedance tomography (EIT). Using this method, they will be able to view three-dimensional (3D) reconstructions of hemorrhaging inside the brain at any given time, noted Dr. Sadleir, who specializes in the use of EIT to detect bleeding inside the body.

To gather data within the brain, small electrodes are placed on the head. For babies, the researchers plan to use eight electrodes, which they will place on an easy-to-apply bandage. “We collect 182 measurements in the head, and from that we make our picture,” Dr. Sadleir said.

While infants are hooked up to the electrodes, their brains will be constantly scanned for signs of hemorrhaging. If bleeding reaches a dangerous level, an alert will sound, similar to other devices used to monitor premature babies in the neonatal intensive care unit.

Brain bleeding is typically detected through regular ultrasound scanning performed about seven to 14 days after a premature baby is born, according to the National Institutes of Health. Most of the time there are no other symptoms that alert doctors to the bleeding. “If we detect bleeding right when it starts, we have a much better chance of mitigating ill effects and also preventing other secondary conditions that happen after a bleed,” Dr. Sadleir said.

EIT is used commercially in lung monitoring, specifically to measure lung activity when patients are placed on ventilators to assist their breathing. Unlike magnetic resonance imaging (MRI) or computed tomography (CT) scans, the images generated through EIT at times look a little blurry because electrical currents do not travel in straight lines, according to Dr. Sadleir. However, the health care team will not study the images in the neonatal intensive care unit (NICU); instead, the readings will translate to a number. This number will be compared with an acceptable baseline. When bleeding is found, the clinicians can then review the image and perform an ultrasound scan to more effectively target the problem.

“We do a lot of general monitoring in the NICU, but we don’t look at a lot of the end organs, such as the brain,” Dr. Weiss said. “We are starting to find out more and more about babies by using brain-specific monitoring. This knowledge may improve outcomes in preterm babies.”

Related Links:

University of Florida
US National Institute of Neurological Disorders and Stroke
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88 (33.140182495117): SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294742911 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
89 (45.061111450195): SELECT id,name,title FROM jos_deeppockets WHERE cat=10 AND TYPE='file_folder' AND published=1 AND id != 294743300 AND id != 294743301 AND id != 294743302 AND id != 294743303 AND id != 294743304 AND id != 294743305 AND id != 294743306 AND id != 294743307 AND id != 294743308 AND id != 294743309 AND id != 294743310 AND metakey != 'aacc' ORDER BY `ordering`
90 (!!!!! 1332.0446014404): SELECT show_live FROM jos_com_show_setting LIMIT 1
91 (49.829483032227): SELECT show_live FROM jos_com_show_setting LIMIT 1
92 (74.148178100586): SELECT show_live FROM jos_com_show_setting LIMIT 1
93 (31.948089599609): SELECT show_live FROM jos_com_show_setting LIMIT 1
94 (36.001205444336): SELECT show_live FROM jos_com_show_setting LIMIT 1
95 (38.862228393555): SELECT show_live FROM jos_com_show_setting LIMIT 1
96 (48.87580871582): SELECT show_live FROM jos_com_show_setting LIMIT 1
97 (28.133392333984): SELECT show_live FROM jos_com_show_setting LIMIT 1
98 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
99 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
100 (27.179718017578): SELECT show_live FROM jos_com_show_setting LIMIT 1
101 (26.941299438477): SELECT show_live FROM jos_com_show_setting LIMIT 1
102 (30.040740966797): SELECT show_live FROM jos_com_show_setting LIMIT 1
103 (30.994415283203): SELECT show_live FROM jos_com_show_setting LIMIT 1
104 (260.1146697998): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
105 (167.1314239502): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
106 (488.0428314209): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
107 (185.01281738281): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
108 (!!!!! 1190.9008026123): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
109 (370.02563476562): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
110 (66.995620727539): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
111 (597.00012207031): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
112 (561.95259094238): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
113 (395.05958557129): SELECT dp.name, dp.id, dp2.name as channel, ex.name as author_name, ex.specialization, ex.images FROM jos_deeppockets as dp LEFT JOIN jos_experts as ex ON ex.id = dp.author LEFT JOIN jos_deeppockets as dp2 ON dp2.id = dp.fid WHERE dp.author != 0 AND dp.cat = 10 AND dp.published = 1 AND ( (dp.fid = 294743300) OR (dp.fid = 294743301) OR (dp.fid = 294743302) OR (dp.fid = 294743303) OR (dp.fid = 294743304) OR (dp.fid = 294743305) OR (dp.fid = 294743306) OR (dp.fid = 294743307) OR (dp.fid = 294743308) OR (dp.fid = 294743309) OR (dp.fid = 294743310) ) ORDER BY RAND() LIMIT 1
114 (123.02398681641): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
115 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
116 (165.93933105469): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
117 (70.095062255859): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
118 (155.92575073242): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
119 (56.982040405273): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
120 (79.870223999023): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
121 (56.028366088867): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
122 (366.9261932373): SELECT * FROM trending_articles WHERE `journal_id` = 10 AND `timestamp` <= NOW() + INTERVAL 7 DAY ORDER BY `order`
123 (!!!!! 53530.931472778): SELECT * FROM jos_deeppockets WHERE jos_deeppockets.cat = 10 AND jos_deeppockets.type = 'deeppockets_item' AND jos_deeppockets.published = 1 AND jos_deeppockets.created + INTERVAL 14 DAY >= NOW() ORDER BY jos_deeppockets.hits DESC LIMIT 7
124 (!!!!! 1003.9806365967): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294742911 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294742911 AND type='deeppockets_item' AND published='1' LIMIT 1
125 (!!!!! 9623.0506896973): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
126 (72.002410888672): ( SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.video != '' AND dp.video_source != '' AND dp.cat = 10 AND dp.published = 1 AND dp.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) UNION ( SELECT dpa.id, dpa.name, dpa.title, dpa.video, dpa.video_source, dpa.created FROM jos_deeppockets_archive AS dpa WHERE dpa.video != '' AND dpa.video_source != '' AND dpa.cat = 10 AND dpa.published = 1 AND dpa.type != 'deeppockets_item_link' ORDER BY created DESC LIMIT 3 ) ORDER BY created DESC LIMIT 3
127 (272.98927307129): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
128 (437.02125549316): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803337 LIMIT 1
129 (966.07208251953): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
130 (338.79280090332): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294803276 LIMIT 1
131 (528.09715270996): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
132 (41.007995605469): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets_archive AS dp WHERE dp.id = 294803276 LIMIT 1
133 (315.90461730957): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
134 (36.954879760742): SELECT dp.id, dp.name, dp.title, dp.video, dp.video_source, dp.created FROM jos_deeppockets AS dp WHERE dp.id = 294802958 LIMIT 1
135 (483.03604125977): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
136 (782.96661376953): SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
137 (555.03845214844): SELECT name FROM jos_deeppockets WHERE id=215
138 (60.081481933594): SELECT name FROM jos_deeppockets WHERE id=215
139 (811.10000610352): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
140 (!!!!! 1064.0621185303): SELECT *, DATE_FORMAT(publish_up,'%d %b %Y') AS date_publish_up, DATE_FORMAT(publish_down,'%d %b %Y') AS date_publish_down FROM jos_events WHERE state=1 AND publish_up > NOW() and extra_info REGEXP '((;)|(^))215((;)|($))' AND catid IN (0,110) ORDER BY publish_up ASC LIMIT 3
141 (141.85905456543): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
142 (86.069107055664): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
143 (!!!!! 10699.033737183): TRUNCATE TABLE jos_trademed_module
144 (102.99682617188): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
145 (66.995620727539): SELECT dp.*, ch.title as channel, exp.name as author_name, exp.specialization as author_specialization, exp.images as author_photo FROM jos_deeppockets_archive as dp LEFT JOIN jos_experts as exp ON exp.id = dp.author LEFT JOIN jos_deeppockets as ch ON dp.fid = ch.id WHERE 1=1 AND dp.cat=10 AND dp.id=294742911 AND (dp.type='deeppockets_item' OR dp.type='deeppockets_item_link') AND dp.published='1' LIMIT 1
146 (602.00691223145): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
147 (84.877014160156): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND (type='deeppockets_item' OR type='deeppockets_item_link') AND published='1' LIMIT 1
148 (87.02278137207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
149 (58.889389038086): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
150 (!!!!! 1454.8301696777): SELECT jos_item.* FROM jos_item INNER JOIN jos_number ON jos_item.numberID=jos_number.id WHERE 1=1 AND (jos_item.imgMini<>'') AND jos_item.type='L' AND jos_item.numberID= ( SELECT jos_number.id FROM jos_number WHERE jos_number.journalID IN (10) and jos_number.id in (select distinct jos_number.id from jos_number join jos_item on jos_item.numberid=jos_number.id where jos_item.type='P') ORDER BY (CONVERT(SUBSTRING(issue,1,2),SIGNED) + (CONVERT(SUBSTRING(issue,3,2),SIGNED)*100)) DESC LIMIT 0,1 ) ORDER BY RAND() DESC LIMIT 6
151 (80.108642578125): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
152 (61.03515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
153 (46.014785766602): SELECT fid FROM jos_deeppockets WHERE cat=10 AND id=294742911 AND type='deeppockets_item' AND published='1' union SELECT fid FROM jos_deeppockets_archive WHERE cat=10 AND id=294742911 AND type='deeppockets_item' AND published='1' LIMIT 1
154 (46.968460083008): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=215 or channel_id is null)
155 (41.961669921875): select distinct links.* from jos_textlinks links join jos_textlinks_placement placement on links.id=placement.link_id where journal_id=(10) and (channel_id=215 or channel_id is null)
156 (42.915344238281): SELECT livesite FROM jos_dp_categories WHERE id=10 AND published='1' LIMIT 1
157 (148.05793762207): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
158 (64.849853515625): SELECT * FROM jos_deeppockets WHERE 1=1 AND id=294742911 AND published='1' union SELECT * FROM jos_deeppockets_archive WHERE 1=1 AND id=294742911 AND published='1' LIMIT 1
159 (108.00361633301): select jos_twitters.link from jos_twitters where cat=10
160 (27.894973754883): select jos_facebook.link from jos_facebook where cat=10
161 (28.133392333984): select jos_google_plus.link from jos_google_plus where cat=10
162 (25.98762512207): select jos_linkedin.link from jos_linkedin where cat=10
163 (256.06155395508): update jos_bannersmanager_banner set impmade=impmade+1 where id in(14202,14203)
164 (!!!!! 1004.9343109131): insert into jos_banners_delta values (14202,'2025-06-23 16:28:12','216.73.216.120','view'),(14203,'2025-06-23 16:28:12','216.73.216.120','view')